libproc/common/pr_memcntl.c

	pr_memcntl.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1998-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/mman.h>
#include "libproc.h"

/*
 * memcntl() system call -- executed by subject process
 */

int
pr_memcntl(struct ps_prochandle *Pr,
    caddr_t addr, size_t len, int cmd, caddr_t arg, int attr, int mask)
{
    sysret_t rval;          /* return value from memcntl() */
    argdes_t argd[6];       /* arg descriptors for memcntl() */
    argdes_t *adp;
    int error;

    if (Pr == NULL)     /* no subject process */
        return (memcntl(addr, len, cmd, arg, attr, mask));

    adp = &argd[0];     /* addr argument */
    adp->arg_value = (uintptr_t)addr;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;

    adp++;          /* len argument */
    adp->arg_value = len;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;

    adp++;          /* cmd argument */
    adp->arg_value = cmd;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;

    adp++;          /* arg argument */
    if (cmd == MC_HAT_ADVISE) {
        adp->arg_value = 0;
        adp->arg_object = arg;
        adp->arg_type = AT_BYREF;
        adp->arg_inout = AI_INPUT;
#ifdef _LP64
        if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32)
            adp->arg_size = sizeof (struct memcntl_mha32);
        else
            adp->arg_size = sizeof (struct memcntl_mha);
#else
        adp->arg_size = sizeof (struct memcntl_mha);
#endif
    } else {
        adp->arg_value = (uintptr_t)arg;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;
    }

    adp++;          /* attr argument */
    adp->arg_value = attr;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;

    adp++;          /* mask argument */
    adp->arg_value = mask;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;

    error = Psyscall(Pr, &rval, SYS_memcntl, 6, &argd[0]);

    if (error) {
        errno = (error > 0)? error : ENOSYS;
        return (-1);
    }
    return (0);
}